I am just curious on what rwhp numbers people are making on the REV-UP vortech kits weather it be a tuner kit or the full kit. i am convinced the 34/32 cog configuration is holding people back from making low to mid 4xxrwhp numbers on a dyno jet. i say this due to my own R&D, the most i could ever get out of the tuner kit was 380 rwhp. that was with a utech,550 injectors,255lph pump, cjm stage1 return fuel system,stillen headers,aps 2.5" duals, aps 2.5" test pipes and mrev lower with 5/16 spacer. once i swapped out to the 32/28 NON REVUP cog setup "still Sc-trim vortech" i was hitting 420 rwhp no problem with a very conservative tune. at this time Sam from GTM is designing a rock solid setup to convert the revup to a non revup cog configuration that will hold up to hard abuse. my car is currently being used as a test mule for this application/conversion with a Si trim vortech head unit.

 

I think you are right Jet. I topped out at 389rwhp. The goal was 400whp but we never quite got there. My torque topped out at 330 ft-lbs.

 

oh and i forgot to add that the 380ish RWHP #'S are with a 2.87 serp pulley!
(that basically works out to a 3.12 serp on a non revup setup). some people talk about going to a 2.62 serp but that pulley would be a world of trouble in my opinion. can you say BELT SLIP!!!!!!!!!! i also dont think the 2.62 will clear due to the jack shaft bearing housing being to large. even if the 2.62 pulley had a considerable amount of material machined off the back side it still would not clear in my opinion. i had to machine about .010" off of the back side of the 2.87 pulley to get it to fit!

 

Here are our dyno's done at SGP with the mods listed in our sig. We did NOT change any of the cogs from the RevUp kit on the 3.12 pulley.

[Edit; sorry, I loaded the wrong size pic's, corrected now]

 

highest i ever hit was 391whp on a conservative tune with a 2.87 pulley before she went kaboom at the track.

 

attached images will not open........

 

like i said i think you will be hard pressed to break 400 rwhp with the revup kit period. unless you change the cog setup.......

 

good info to know since I am about to do the rev-up vortec tuner kit. I will make sure and change over to the non rev-up cogs.

 

Is there a simple explination for why the rev-up will not make as much hp as the non with the vortech?

 

I would post my #'s but i don't want to make the rev up guys feel even worst

 

When you get the cog configuration right i have a feeling you will be at the top of the list whp wise with the rev-up.

 

Here is one we just wrapped up. Non Rev up, our S1 Shortblock, Nismo Cams and Springs.
Power past 7000RPM FTW! Add about 10% or so to simulate a dynojet number, or 50% to simulate the VRT Moon Dyno.

 

/\
Larry will be happy with that!

 

those numbers look really good especially with a 3.12 pulley! what is your opinion sharif on my theory of the rev-up kits not making it past 400 rwhp assuming a stock block, cams, etc?

 

Do you have a boost curve plot...from before and after?

 

the revup cog setup spins the blower slower in the lower rpm range, this is due to the revup's higher red line. but we all know most fi setups will not make power up to 7000 rpm without extensive breathing mods ie, cams, head work, etc, etc. most flat line and dip at 6500 to 6600 rpm's. this is why i am so adimit on running the non revup cog config. that way the blower comes up to speed quicker and hits max rpm by 6600 rpm plus the torque curve will be much better. i have noticed most if not all revup vortechs are topping out at around 380 dyno jet rwhp. this is mostly due to this 34/32 cog configuration. i learned this the hardway after many tunes trying to get more power out of the stock revup cog setup. once i ran the 32/28 cog setup i could easily break the 4xxrwhp mark.

 

sorry but i do not.

 

Sharif, can you post a comparison of my graph/psi vs that rev-up for a comparison?

What's the compression of the pistons on that shortblock, ya know for future reference

 

LOL VRT moon dyno haha. Nicely done as usual Sharif.

 

This car was a non-rev up as well. Compression was 9.0:1 with our FP/Arias ED pistons.